Experimental test of quantum contextuality in neutron interferometry

Details Experimental test of quantum contextuality in neutron interferometry Experimental test of quantum contextuality in neutron interferometry

2009-04-29

arxiv.org/abs/0904.4576v2

Phys. Rev. Lett. 103 (2009) 040403

Physics

Quantum Physics

REVTeX4, 4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.103.040403

We performed an experimental test of the Kochen-Specker theorem based on an inequality derived from the Peres-Mermin proof, using spin-path (momentum) entanglement in a single neutron system. Following the strategy proposed by Cabello et al. [Phys. Rev. Lett. 100, 130404 (2008)], a Bell-like state was generated and three expectation values were determined. The observed violation 2.291 +/- 0.008 > 1 clearly shows that quantum mechanical predictions cannot be reproduced by noncontextual hidden variables theories.

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